PM Standards Review Schedule

This page reviewed November 24, 2009


On Thursday, June 5, 2003, the Office of Administrative Law approved the amendments to the regulations for the State Ambient Air Quality Standards for particulate matter (PM) and sulfates. The Staff of the Air Resources Board (ARB) and Office of Environmental Health Hazard Assessment (OEHHA) reviewed the scientific literature regarding the health effects and exposure to PM. The conclusion of that review was the development of a staff report containing recommendations for revising the current ambient air quality standards for PM10 (particulate matter 10 micrometers in diameter and smaller). On May 3, 2002, ARB staff released a final staff report which recommends lowering the level of the annual standard for PM10 and establishes a new annual standard for PM2.5 (particulate matter 2.5 micrometers in diameter and smaller). The report also recommends changing the monitoring methods for the PM10 and sulfates standards. ARB staff presented their final recommendations to amend the PM standards to the Air Resources Board on June 20, 2002 [view the press release]. The new standards became effective on July 5, 2003.
Listed below are the milestones of the PM and Sulfates Standards review. Staff recommendations and their basis were
peer-reviewed by the University of California appointed Air Quality Advisory Committee on January 23 and 24 and April 3, 2002. All meeting and workshop notices are posted below.
This work follows a preliminary evaluation of all health-based ambient air quality standards in December 2000 to determine their adequacy to protect public health, particularly that of infants and children. Staffs of the ARB and OEHHA concluded in the December 2000 report that significant harmful health effects may occur among both children and adults when outdoor PM10 concentrations are at or near the current State standards. The health-based standards evaluation was a requirement of The Children's Environmental Health Protection Act (Senate Bill 25, Escutia, 1999).

Schedule


June 28, 2001

Informational Item to the Air Resources Board Regarding Review of the Particulate Matter Standards (Board Presentations):
 

November 30, 2001

The Public Release of the Report to the Air Quality Advisory Committee on the Review of the California Ambient Air Quality Standards for Particulate Matter and Sulfates
 

December 2001

Public workshops were held to discuss the PM staff report to the Air Quality Advisory Committee. Dates, times and locations for upcoming workshops are included in the workshop notice below:
 

January 23 and 24, 2002

Air Quality Advisory Committee (AQAC) Peer reviewed PM staff report.
 

March 2002

Draft PM2.5 24-hour standard recommendation to AQAC to be released to
the public.
 

April 3, 2002

Second AQAC meeting to review staff proposal for a 24-hour PM2.5 standard.
 

May 3, 2002

Final Staff Report and Recommendations to Amend the Ambient Air Quality Standards for Particulate Matter and Sulfates
 

June 5 and 6, 2002

Public workshops to discuss the final PM staff report - scheduled for June 5 and 6, 2002 in Sacramento and El Monte.
 

June 20, 2002

Air Resources Board adopts staff recommendations for revising Particulate Matter standards.
 

August 15, 2002

15-Day Review of "Notice of Public Availability of Modified Text for Ambient Air Quality Standards for Suspended Particulate Matter and Sulfates"

October 10, 2002

15-Day Review of "Second Notice of Public Availability of Modified Text for Ambient Air Quality Standards for Suspended Particulate Matter and Sulfate"

June 5, 2003

New ambient air quality standards for PM10 and PM2.5 take effect in California.
 

May 22, 2008

Draft staff report released on a revised methodology for quantifying the number of premature deaths associated with PM2.5 exposure.

October 24, 2008

Final staff report released on a revised methodology for quantifying the number of premature deaths associated with PM2.5 exposure. 


For more information on review of the PM ambient air quality standards, please contact
Dr. Linda Smith at (916) 327-8225.



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